.erweima {

    width: 120px;
    height: 120px;
    background-color: white;
    opacity: .2;
    position: absolute;
    top: 0%;
    left: 100%;
    transform: translate(-100%);



}

.erweima:hover {


    width: 170px;
    height: 170px;
    z-index: 99;
    transition: ease-in-out;
    transition-duration: 1.1s;
    opacity: unset;
    background-color: grey;
    border-radius: 5% 0 5% 50%;

    overflow: hidden;
    background-image: url("https://img0.baidu.com/it/u=688482343,4044875939&fm=26&fmt=auto");
    background-repeat: no-repeat;
    background-position: center;
    /* background-size: cover; */

}